I have an HTC One X with a bad motherboard, can it be repaired or is it cheaper to buy a new phone?

it fell on the floor and broke its screen 3months ago but was still working ,then my daughter threw on the floor and it went blank and wont come except show blinks of light at d cursors below...I took it to a phone repairer who said the mother board is faulty but d cost of buying a new phone is not favourable for me now